Improvement in attaching kmobs to spindles



CORNELIUS COLEMAN, OF WEST MERIDEN, CONNECTICUT, ASSIGNOR TO PARKER AND WHIPPLE COMPANY, OF SAME PLACE.

IMPROVEMENT IN ATTACHlNG KNOBS TO SPINDLES.

Specification forming part of Letters Patent No. 169,42 l, dated November 2, 1875 application iiled September 2P, 1875.

To all whom it may concern Be it known that I, CORNELIUS COLEMAN, of West Meriden, in the county of New Haven and State of Connecticut, have invented a new Adjustable Door-Knob Spindle; and I do hereby' declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description 'of the same, and which said drawings constitute part of this specification, and represent 1n- Figure l, perspective view of the spindle 5 Fig. 2, longitudinal section with the knob at tached.

This invention relates t0 an improvement in the construction of door-knob spindles, the object being to automatically "engage the knob 'with the spindle, so as to hold it in its proper relative position; and it consists in providing the spindle with a serrated spring, so that when the neck of the knob is forced upon the spindle'one of the serra-tions in the spring will engage a corresponding projection in the neck.

The spindle is substantially the same usual square bar A. On one side a longitudinal groove, c, is formed, and into this a spring, d, placed and secured by the inner end, so as to become practically a part ot' the spindle. The upper surface of this spring is serrated, or formed with a succession of notches. The spring, when free, rests above the surface ot' the spindle. The neck B ot' the knob is formed with a recess to pass onto the spindle in the usual manner, and within the neck a shoulder, e, is formed, so as to engage either of the notches ot the spring, as seen in Fig. 2. The other end of the spindle is made fast to the knob for that end in the usual manner, and in that condition the spindle is passed through the door and hub of the latch, and. then the neck B of the other knob passed on over the I spring to its proper position, and so that the shoulder c will engage a corresponding notch in the spring. When the knob is arranged in its proper position this securely holds the knobs together, and without the liability of displacement as in the common mode ot' attachment, as by a screw through the neck.

In order to detach the knob, ifdesirable, an opening,f, is formed through the neck adjacent to the shoulder e, so that an instrument may be inserted through the opening and bear the spring down away from and so as to redrawn from the spindle.

I prefer to arrange the spring in a groove, so that the neck ofthe knob will take a bearing upon the spindle each side of the spring; but the spring may be the full width of the spindle, or arranged at one end, it only being essential that the notched or serrated spring be arranged in connection with the spindle.

am aware that it is not new to attach knobs to spindles by means of a spring to engage the two, and I therefore do not wish to be understood as broadly claiming such construction.

I claimhe crmbina-tion of the spindle A,the spring D attached to the spindle, its free end at the end of the spindle, and constructed with several notches, a knob, the neck of which is constructed to pass onto thespindle over the free end ot' the said spring, and with a shoulder, e, to engage either of the said notches on the spring, and with the perforation j' through the neck onto the spring, substantially as described.

CORNELIUS COLEMAN.

lease the shoulder, and allow the knob to be 

